Rotary motor



C. G. EIDSON, T. DAVIS AND D. E. CROUSE.

ROTARY MOTOR.

APPLICATION FILED JAN. I4. 1916. RENEWED AUG. 23, 1919.

Patented Nov. 4, 1919.

2 SHEETSSHEET I QQNN WITNESSES:

6% 6, fia/W ZQM C. G. EIDSON, T. DAVIS AND D. E. CROUSE.

ROTARY MOTOR.

APPLICATION FILED N44. 1916. RENEWED AUG. 23. I919.

1,320,679, Patented Nov. 4, 1919.

2 SHE ETSSHEET 2 INI/E/VTUR THE ccnumnm pumozmkhu um. WASHINGTON. n. c.

CHARLES GEORGE EIDSQN AND THOMAS DAVIS, OF BALTIMORE, AND DAVID ELDRIDGE CROUSE, OF ANNAPOLIS, MARYLAND, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE -JOI-IN FORD STARTER COMPANY, OF BALTIMORE, MARYLAND,' A CORPORATION OF MARYLAND.

ROTARY Moron.

To all whom it may concern: 1

Be it known thatwe, CHARLES G. EIDsoN and THOMAS DAVIS, residents of Baltimore city, in the State of Maryland, and DAVID E. (house, a resident of Annapolis, in the county of Anne Arundel, in the State of vMaryland, all citizens of the United States,

have made. certain new and useful Improvements in Rotary Motors, .of which the following is a specification.

Our invention relates to improvements in .rotary motors, and it consists in the com binations, constructions, and arrangements herein described and claimed.

An object of our invention is to provide an arrangement by means of which an inter nal combustion engine such as the motor of an automobile, may be started by the pushing of a pedal or other similar device, said starting being accomplished by the use of compressed air. I

An object of our invention is to provide said motor being of the-so-called rotary type in which sliding pistons and stationary abutments are made use of.

A further object of our invention is, to

' provide a motor having means for equalizing the pressure on the ends of spring pressed sliding pistons, thereby insuring the contact of the pistons .with the walls of the casing.

A further object of our invention is to provide means for producing the impact of the slidable pistons against the stationary abutments.

Other objects and advantages will appear f in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

' Our'invention is illustrated in the accomcrating mechanism.

Fig. 2 is a section along the line 2-2 of Fig. 1, looking in the direction of the arrows. Fig. 3 is a perspective view of one of the rotor blades or pistons.

Fig. 4 is a perspective view of one of the a stator blades or abutments.

Referring now particularly to Figs. 1-v and 2,.we'haveshown therein a shaft 1.-

Specification of LettersPatent.

Patented Nov. a, rain.

1916, Serial No. 72,069. Renewed August 23, 1819. Serial No. 319,517.

One end of this shaft bears a clutch member 2 such as that ordinarily used in starting a motor or engine by hand with a crank. The shaft revolves 1n the interlor of a sleeve 3 which is provided with anti-friction linings 4. The sleeve 3 is disposed in the interior of a hub 5 and is provided with a key 6 which slides in a groove 7 in the .hub 5 so that the sleeve may have a longitudinal movement with respect to-the hub, and any disposed meinberssimilar to the spokes of a wheel. These members 10 extend from one wall 8 to the other and are slotted or cored as shown at 11 to receive blades or pistons 12 which are adapted to slide radially with respect to the axis of the shaft 1. The blades or pistons are like that shown in -Fig. 3. Each piston is provided with a re- 7 cess 12 and with bores 12 extending from;

one edge of the piston nearly to the other edge; Laterally extending holes 12 communicate with the bores as shown in Fig. 8.

At the inner end of the slots 0r cored out places 11 we provide lugs which extend from one wall of the slot to the other, these lugs being for the purpose of strengthening the spokelike members 10 and being secured to the hub 5 by means of screws 14. It is obvious that the lugs might be formed integrally with the members 10 but we prefer to make them in the manner described be I cause of ease in construction. The lugs 13' are arranged to enter the slots .12 when the pistons are moved inwardly. provided and are disposed within the bores 12 ,.these springs tending to force the pistons outwardly.

. The parts 5 to 15 inclusive constitute what we term the rotor and its pistons. The

Springs 15 are stator comprises an outer casing composed of the radially extending side walls 16 and an outer'cylindrical concentricportion 18 spaced from the member 9 as clearly shown in the drawings. The walls 16 have lateral extensions 16 which form bearings for the sleeve 5. At opposite portions of the cylindrical member 17 are offsets 19 into which springs 20 may play. Thesesprings 20 are disposed "adjacent to. approaches 21 which also serve as means for retaining the sliding abutments 22. These approaches are preferably formed as an integral'casting with the wall of the cylinder 17 but may be made the cylinder 17. A spring 24. is disposed in the offset into which the intakepipe 25 is secured. Onthe opposite side of the shaft a similar'arrangement is provided.

Referring nowparticularly to Fig. 1, it will be seen that the shaft 1 passes through the'casing 26 of the aircompressor. This casing is provided with -an extension 2'6 which forms a bearing for the clutch 2, a lining 26 being-provided. At the end of the extension 26 is a'hinged cap 27 which is provided with a spring clasp 28 that normally holds the cap closed over the end of the extension.

Secured to the shaft 1 is an eccentric member 29wh'ich, as will be noted, is provided'with a strap 30. The eccentric 29 is wider than" the strap in order that it may have a longitudinal movement with the shaft as explained later. The strap of the eccentric is connected to a piston 31' disposed'in thecylinder 32. The latter constitutes-the cylinder'of the compressor and'is provided with check valves 33 and 34.

Referring now particularly to Fig. 2,the

7 air is shown entering from the pipes-25 into the space'between the cylinders 9 and 17, the pistons 12 being extended to engage the walls of the cylinder 17. The rotor will therefore be turned since the compressed air is acting on opposite sides of the pistons which 211 6311311121.1386. on the opposite sides of the shaft 1. It will also beobserved that the other bore of piston 12 is in a position to provide for the exhaust of the air through the exhaust ports 71. The exhaust does not take place directly into the atmosphere but the space 72 between the outer'jcylindrical portion 18 and the cylindrical member '17 serves the purpose of a muffler.

- haust finally takes place at the openingv 73.

This opening 73 is disposed in such posltion that the spent air must travel a considerable distance before finally escaping. This tends to reduce the noise of the engine and to eliminate the whistling or hissing sound.

' In Fig. 2 those-pistons 12 which have just passed over exhaust ports 71,-willengage the springs 20. This tends to lessen The exthe 511061; occasioned by striking the approaches 21. The latter are in .theform of cams" which cause'the slidable pistons. to re; tract against the tension of the springs 15 and thus permit the pistons to pass the abutments 22. After passing these abutments the pistons 12 are thrust forward by the springs 15 until they again contact with the inner walls of the cylindrical member 17. The springs-24 are for the purpose of cushioning the engagement of the pistons 12. with the walls 17.

It will be noted thatthefull pressure of the "steam comes on the end of the piston 12 immediately after passing the abutment.

Thisfwou'ld tend to press the piston inwardly away from the wall of the: casing'were it not forthe fact'that the steam passes throu'ghthe openings 12, see Fig. 3,'and gets behind the piston, thereby equalizing the pressure and permitting thesprings 15 to exert their maximum-tension to hold the pistons in close 'engagement'withthe wall of the casing. It will be noted that-'when'ai-r enters the space between the members 9-and 17, it

passes at once to the inner end of the piston through the" openings 12 and the'bores 12 Thus'the air pressure is equalized so that the holding of the pistons-against the wallsof-the outer cylindrical member is assuredw Similarly theair enters through the passages 23 and 22, gets behind the sliding abutments- 22 soj as tOi illCl the springs 73 to hold the abutments'in'close engagement with the outer surface of the inner cylinder 9. "Simultaneously with the starting of the motor, the pressure of the pedal 46 causes the movement of thelever'41 through the medium 'ofthe rod43=and lever 44,-and this brings-the clutch members 3 and 49 into operative engagement, thereby imparting a rotary movemenrw the shaft 1.

'VVe claim i 1. A rotary motor comprising a stator, a

having a series of spokes, radially movable I pistons carried by said rotor, springs arranged to bear on the inner ends of said pistons for' forcing themoutwardly, said springs; being dISPQSGCl 1n recesses in the spokes-of the rotor, means for equalizing the pressure onthe ends of'said pistons, said means comprising passages in saidpistons arranged to establish communication with the space between therotor'and the stator, and the recesses containing thespring, abutment supports 'carried by the stator," and having cam surfaces arranged to be engaged the pistons of said mama move the cylindrical rotor spaced from'"rsaid stator and pistons inwardly against the tension of the springs, and'springs carried by said stator 'at each end of saicbabutment' supports for cushioning the' 'impact of the slidable pistons'durlng the movementof the pistons toward and away from said abutment sup-' ports.

2. A rotary motor comprising a stator, a cylindrical rotor spaced from said stator, radially movable pistons carried by said rotor, springs arranged to bear on the inner ends of said pistons for forcing them outwardly, abutment supports carried by said stator and having cam surfaces arranged to be engaged by the pistons of said rotor to move the pistons inwardly against the tension of the springs, and springs carried by said stator at each end of said abutment supports for cushioning the impact of the slidable pistons during the movement of the pistons toward and away from said abutment supports. 7

3. A rotary motor comprising a stator, a cylindrical rotor spaced from said stator, radially movable pistons carried by said rotor, springs arranged to bear on the inner ends of said pistons for forcing them outwardly, abutment supports carried by said stator and having cam surfaces arranged to be engaged by the pistons of said rotor to move the pistons inwardly against the tension of the springs, springs carried by said stator at each end of said abutment supports for cushioning the impact of the slidable pistons during the movement of the pistons toward and away from said abutment supports, a slidable abutment carried by each of said abutment supports, and springs for forcing said slidable abutments into contact with the surface of the rotor.

1-. A rotary motor comprising a stator, a cylindrical rotor spaced from said stator, radially movable pistons carried by said rotor, springs arranged to bear on the inner ends of said pistons for forcing them outwardly, abutment supports carried by said stator and having cam surfaces arranged to be engaged by the pistons of said rotor to move the pistons inwardly against the tension of the springs, springs carried by said stator at each end of said abutment supports for cushioning the impact of the slidable pistons during the movement of the pistons toward and away from said abutment supports, a slidable abutment carried by each of said abutment supports, springs for forcing said slidable abutments into contact with the surface of the rotor, and means for admitting fluid pressure to the outer end of said slidable abutments for assisting the springs.

5. A rotary motor comprising a stator, a cylindrical rotor spaced from said stator.

radially movable pistons carried by said.

rotor, springs arranged to bear on the inner ends of said pistons for forcing them outwardly, abutment supports carried by said stator and having cam surfaces arranged to be engaged by the pistons of said rotor to move the pistons inwardlv against the tension of the springs, springs carried by said stator at each end of said abutment supports for cushioning the impact of the slidable pistons during the movement of the pistons toward and away from said abutment supports, a slidable abutment carried by each of said abutment supports, springs for forcing said slidable abutments into contact with the surface of the rotor, and a passage in each of said abutment supports communicating at one end with the fluid pressure intake and at the other end with the rear of the abutments for permitting the fluid pressure to assist the springs.

CHARLES GEORGE EIDSON.

THOMAS DAVIS.

DAVID ELDRIDGE CROUSE.

Witness:

H. G. BISHOP.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

